Answer:
You can only add like terms with like terms, so the terms that can be combined with 3a are the terms that end in an a.
So, the answers are:
4a and 14a
Let me know if this helps!
No.
2+4 is not greater than 8.
Cool, but where is the diagram?
When n = 1 first term = -6
n = 2 second term = 0
n = 3 third term = 6
n = 4 4th term = 12
so we have an Arithmetic sequence first term = -6 and common difference = 6
Sum 14 terms = (14/2)[2*-6 + (14-1)*6]
= 462 answer
